DE19957814A1 - Belt retractor system - Google Patents

Belt retractor system

Info

Publication number
DE19957814A1
DE19957814A1 DE19957814A DE19957814A DE19957814A1 DE 19957814 A1 DE19957814 A1 DE 19957814A1 DE 19957814 A DE19957814 A DE 19957814A DE 19957814 A DE19957814 A DE 19957814A DE 19957814 A1 DE19957814 A1 DE 19957814A1
Authority
DE
Germany
Prior art keywords
belt
electric motor
belt retractor
retractor according
control unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE19957814A
Other languages
German (de)
Other versions
DE19957814C2 (en
Inventor
Cornelius Peter
Rolf Duerrstein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BCS Automotive Interface Solutions GmbH
Original Assignee
BCS Automotive Interface Solutions GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BCS Automotive Interface Solutions GmbH filed Critical BCS Automotive Interface Solutions GmbH
Priority to DE19957814A priority Critical patent/DE19957814C2/en
Priority to EP00125239A priority patent/EP1104729B8/en
Priority to ES00125239T priority patent/ES2158832T3/en
Priority to DE50010505T priority patent/DE50010505D1/en
Priority to US09/726,666 priority patent/US6447012B2/en
Priority to KR1020000071876A priority patent/KR20010062011A/en
Priority to CNB001344544A priority patent/CN1140431C/en
Priority to JP2000366603A priority patent/JP3786577B2/en
Priority to CZ20004508A priority patent/CZ293259B6/en
Priority to BRPI0005685-5A priority patent/BR0005685B1/en
Publication of DE19957814A1 publication Critical patent/DE19957814A1/en
Application granted granted Critical
Publication of DE19957814C2 publication Critical patent/DE19957814C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/343—Belt retractors, e.g. reels with electrically actuated locking means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/44—Belt retractors, e.g. reels with means for reducing belt tension during use under normal conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R2021/01204—Actuation parameters of safety arrangents
    • B60R2021/01252—Devices other than bags
    • B60R2021/01265—Seat belts
    • B60R2021/01272—Belt tensioners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R2021/01311—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over monitoring the braking system, e.g. ABS
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R2022/3421—Belt retractors, e.g. reels with means for locking the belt reel in a non-use position, e.g. for seat mounted retractor when the seat is in a non-locked condition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/44—Belt retractors, e.g. reels with means for reducing belt tension during use under normal conditions
    • B60R2022/4473—Belt retractors, e.g. reels with means for reducing belt tension during use under normal conditions using an electric retraction device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B60R2022/4666—Reels with means to tension the belt in an emergency by forced winding up characterised by electric actuators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01512—Passenger detection systems
    • B60R21/01544—Passenger detection systems detecting seat belt parameters, e.g. length, tension or height-adjustment
    • B60R21/01548—Passenger detection systems detecting seat belt parameters, e.g. length, tension or height-adjustment sensing the amount of belt winded on retractor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01512—Passenger detection systems
    • B60R21/01544—Passenger detection systems detecting seat belt parameters, e.g. length, tension or height-adjustment
    • B60R21/0155—Passenger detection systems detecting seat belt parameters, e.g. length, tension or height-adjustment sensing belt tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/36—Belt retractors, e.g. reels self-locking in an emergency
    • B60R22/415—Belt retractors, e.g. reels self-locking in an emergency with additional means allowing a permanent locking of the retractor during the wearing of the belt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/02—Articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2207/00—Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors
    • B65G2207/18—Crossing conveyors

Abstract

Der Gurtaufroller für ein Insassen-Rückhaltesystem enthält einen Rahmen, eine in dem Rahmen drehbar gelagerte Gurtspule, einen an die Gurtspule angekoppelten Elektromotor-Antrieb, einen Sperrmechanismus zur selektiven Blockierung der Gurtspule und einen fahrzeugsensitiven Sensor. Der Sperrmechanismus wird durch einen Aktor betätigt. Eine elektronische Steuereinheit ist mit einer Eingangsschnittstelle und einer Ausgangsschnittstelle versehen. Der fahrzeugsensitive Sensor ist an die Eingangsschnittstelle und der Aktor sowie der Elektromotor-Antrieb an die Ausgangsschnittstelle angeschlossen.The belt retractor for an occupant restraint system contains a frame, a belt spool rotatably mounted in the frame, an electric motor drive coupled to the belt spool, a locking mechanism for selectively blocking the belt spool and a vehicle-sensitive sensor. The locking mechanism is actuated by an actuator. An electronic control unit is provided with an input interface and an output interface. The vehicle-sensitive sensor is connected to the input interface and the actuator, and the electric motor drive to the output interface.

Description

Die Erfindung betrifft einen Gurtaufroller für ein Insassen- Rückhaltesystem.The invention relates to a belt retractor for an occupant Restraint system.

Moderne Gurtaufroller sind zusätzlich zu den üblichen gurtband- und/oder fahrzeugsensitiven Sperrfunktionen mit bedarfsweise vorgese­ henen Zusatzfunktionen ausgestattet. Eine dieser Zusatzfunktionen ist die Sicherung von Lasten oder Kindersitzen durch einen Blockier­ zustand, der durch vollständigen Gurtbandabzug und anschließendes Wiederaufrollen des Gurtbandes eingeschaltet wird. Die Rückschaltung in den notfallsperrenden Zustand wird durch vollständiges Aufwickeln des Gurtbandes erreicht. Eine andere Zusatzfunktion ist die Gurttrage­ erkennung, wozu die abgezogene Gurtbandlänge ermittelt wird.Modern belt retractors are in addition to the usual webbing and / or vehicle-sensitive locking functions with pre-selected if necessary equipped additional functions. One of these additional functions is securing loads or child seats with a lock condition that is due to complete webbing deduction and subsequent Rewinding the webbing is turned on. The downshift in the emergency blocking state is by complete winding of the webbing reached. Another additional function is the belt carrier Detection of what the deducted webbing length is determined for.

Derartige Zusatzfunktionen eines Gurtaufrollers erfordern einen hohen Aufwand an mechanischen Bauteilen. Besonders aufwendig ist die Bereitstellung unterschiedlicher Gurtaufrollertypen für die jeweils angeforderten Zusatzfunktionen. Such additional functions of a belt retractor require one high expenditure on mechanical components. It is particularly complex Provision of different types of belt retractors for each requested additional functions.  

Durch die Erfindung wird ein neuartiger Gurtaufroller geschaffen, der bei einem einheitlichen mechanischen Grundaufbau die bedarfsweise Verwirklichung einer Reihe von Zusatzfunktionen ermöglicht.The invention creates a novel belt retractor, which with a uniform basic mechanical structure, if necessary Enables a number of additional functions.

Der erfindungsgemäße Gurtaufroller enthält einen Rahmen, eine in dem Rahmen drehbar gelagerte Gurtspule, einen Sperrmechanismus zur selektiven Blockierung der Gurtspule und einen fahrzeugsensitiven Sensor. Zur Betätigung des Sperrmechanismus ist ein Aktor vorgesehen. Anstelle der herkömmlichen Aufrollfeder ist ein Elektromotor vorgese­ hen, der die Gurtspule mit dem jeweils geforderten Aufrollmoment beaufschlagt. Die Funktionen des Gurtaufrollers werden durch eine elektronische Steuereinheit gesteuert, die eine Eingangsschnittstelle und eine Ausgangsschnittstelle aufweist. Der fahrzeugsensitive Sensor ist an die Eingangsschnittstelle angeschlossen, und der Aktor ist an die Ausgangsschnittstelle angeschlossen, ebenso wie der Elektromotor. Mit diesem Grundkonzept sind die Sperr- und Aufrollfunktionen des Gurtaufrollers leicht an die jeweils gestellten Forderungen anzu­ passen, weil lediglich Programmdaten anzupassen sind, nach denen die elektronische Steuereinheit arbeitet. Ferner können an die Eingangs­ schnittstelle der elektronischen Steuereinheit verschiedene Sensoren angeschlossen werden, deren Ausgangssignale bei der Ansteuerung des Sperrmechanismus berücksichtigt werden. Ebenso können an die Ausgangs­ schnittstelle der elektronischen Steuereinheit weitere Aktoren oder Stellglieder und dergleichen angeschlossen werden, deren Funktionen in Abhänigkeit von den Sensorsignalen gesteuert werden, die über die Eingangsschnittstelle der elektronischen Steuereinheit abgefragt werden.The belt retractor according to the invention contains a frame, a in the frame rotatably mounted belt reel, a locking mechanism for selective blocking of the belt reel and a vehicle sensitive Sensor. An actuator is provided to actuate the locking mechanism. Instead of the conventional winding spring, an electric motor is provided hen who the belt reel with the required winding torque acted upon. The functions of the belt retractor are performed by a electronic control unit that controls an input interface and has an output interface. The vehicle sensitive sensor is connected to the input interface and the actuator is on the output interface is connected, as is the electric motor. With this basic concept, the locking and reeling functions of the Belt retractor easily to meet the demands made fit, because only program data are to be adapted, according to which the electronic control unit works. Furthermore, at the entrance interface of the electronic control unit various sensors are connected, the output signals when the Locking mechanism are taken into account. Likewise, the output interface of the electronic control unit further actuators or Actuators and the like are connected, whose functions in Depending on the sensor signals that are controlled via the Input interface of the electronic control unit queried become.

Bei der bevorzugten Ausführungsform verfügt der Gurtaufroller über einen Elektromotor, insbesondere Servomotor, der nicht nur die Funktion der Aufrollfeder des herkömmlichen mechanischen Gurtauf­ rollers übernimmt, sondern auch eine Vorstraffung des Gurtbandes bei einem drohenden Fahrzeugaufprall gewährleisten kann.In the preferred embodiment, the retractor has via an electric motor, especially a servo motor, which is not only the Function of the winding spring of the conventional mechanical belt rollers takes over, but also a pre-tensioning of the webbing can guarantee an impending vehicle impact.

Einer der an die Eingangsschnittstelle angeschlossenen Sensoren liefert bei der bevorzugten Ausführungsform ein die Gurtspulendrehung repräsentierendes Inkrementalsignal, vorzugsweise in Kombination mit einem weiteren, die Drehrichtung anzeigenden Signal. Diese Signale werden von der elektronischen Steuereinheit durch aufwärts/abwärts- Zählung ausgewertet, um den absoluten Drehwinkel der Gurtspule und somit die abgezogene Gurtbandlänge zu bestimmen.One of the sensors connected to the input interface provides the belt spool rotation in the preferred embodiment representing incremental signal, preferably in combination with  another signal indicating the direction of rotation. These signals are controlled by the electronic control unit by up / down Counted to the absolute angle of rotation of the belt spool and thus to determine the strapped webbing length.

Bei dieser bevorzugten Ausführungsform hat der Gurtaufroller die folgende Funktionalität, wobei einzelne Funktionen auch nur bei Bedarf verwirklicht sein können:
In this preferred embodiment, the belt retractor has the following functionality, wherein individual functions can also be implemented only when required:

  • - Kinder/Lastensicherung- Children / load protection
  • - Gurttrageerkennung- Belt wear detection
  • - Fahrzeugsensitive Sperrung- Vehicle-sensitive blocking
  • - Aufrollfeder- roll-up spring
  • - Komfortgetriebe- Comfort gear
  • - Sperrung bei nichtverriegelter Sitzlehne- Locking when the seat back is not locked
  • - Gurtbandsensitive Sperrung- Belt-sensitive locking
  • - Gurtband-Vorstraffung.- Webbing pre-tensioning.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der folgenden Beschreibung mehrerer Ausführungsformen und aus den Zeichnun­ gen, auf die Bezug genommen wird.Further advantages and features of the invention result from the following description of several embodiments and from the drawings to which reference is made.

In den Zeichnungen zeigen:The drawings show:

Fig. 1 ein Blockdiagramm einer elektronischen Steuereinheit mit eingangsseitig daran angeschlossenen Sensoren und ausgangsseitig angeschlossen einem Aktor und einem Elektromotor; Fig. 1 is a block diagram of an electronic control unit with input side and output side connected thereto sensors connected to an actuator and an electric motor;

Fig. 2 eine Perspektivansicht des Gurtaufrollers mit seitlich angebautem Elektromotor-Antrieb; Figure 2 is a perspective view of the belt retractor with an electric motor drive attached to the side.

Fig. 3 eine Explosionsansicht des Gurtaufrollers mit Elektro­ motor-Antrieb; Fig. 3 is an exploded view of the belt retractor with an electric motor drive;

Fig. 4 eine Seitenansicht des Gurtaufrollers bei abgenommenem Elektromotor-Antrieb und Fig. 4 is a side view of the belt retractor with the electric motor drive removed and

Fig. 5 einen Axialschnitt im Bereich des Elektromotor-Antriebs. Fig. 5 is an axial section in the region of the electric motor drive.

Bei dem erfindungsgemäßen Gurtaufrollersystem sind, auf einem einheitlichen elektromechanischen Grundkonzept aufbauend, zahlreiche Ausführungsvarianten vorgesehen, die sich in der Funktionalität voneinander unterscheiden. Die Funktionalität wird im wesentlichen durch die an die Eingangsschnittstelle der elektronischen Steuer­ einheit angeschlossenen Sensoren und durch das fest eingespeicherte Programm bestimmt, nach dem die Steuereinheit arbeitet.In the belt retractor system according to the invention are on one building a uniform electromechanical basic concept, numerous Design variants provided that differ in functionality differentiate from each other. The functionality is essentially through to the input interface of the electronic tax unit connected sensors and by the permanently stored Program determines according to which the control unit works.

Bei der bevorzugten Ausführungsform sind Zusatzfunktionen verwirklicht, die mit herkömmlichen Gurtaufrollern nicht realisierbar sind. Eine dieser Zusatzfunktionen ist die vorsorgliche Gurtband­ straffung in einer kritischen Situation, z. B. einer Vollbremsung. Bei Verwendung eines sehr leistungsfähigen Elektromotor-Antriebs ist eine Straffkraft von 250 N oder mehr möglich. Realistisch ist ein Straffweg von 120 mm oder mehr bei einer Straffzeit von nur etwa 120 ms. Mit einer solchen Vorstraffung kann die Gurtlose bereits vor einem Unfall entfernt werden, um das Verletzungsrisiko für Insassen zu minimieren und den Wirkungsgrad des herkömmlichen, insbesondere pyrotechnischen Gurtstraffers zu optimieren.In the preferred embodiment, additional functions are realized that can not be realized with conventional belt retractors are. One of these additional functions is the precautionary webbing tightening in a critical situation, e.g. B. full braking. At Using a very powerful electric motor drive is one Tightening force of 250 N or more possible. A tightening path is realistic of 120 mm or more with a tightening time of only about 120 ms. With Such a pretensioner can be used before the accident removed to minimize the risk of injury to occupants and the efficiency of the conventional, especially pyrotechnic Optimize belt tensioners.

Die Gurtbandvorstraffung kann auch zu dem Zweck eingesetzt werden, die Sitzposition eines Insassen zu korrigieren, um die Gefahr von Verletzungen durch aufblasbare Rückhalteeinrichtungen (Airbag) zu minimieren.The pretensioner can also be used for this purpose to correct the seating position of an occupant to avoid danger of injuries caused by inflatable restraints (airbag) minimize.

Wenn es im Anschluß an eine Gurtbandvorstraffung wieder zu einem normalen Fahrzustand kommt, kann die Gurtstraffung rückgängig gemacht werden.If it comes back to a following a pretensioner normal driving condition, the belt tensioning can be undone become.

Andererseits ist nach erfolgter Gurtbandvorstraffung und anschließender Freigabe eine erneute Gurtbandvorstraffung möglich.On the other hand, after pretensioning and Subsequent approval, a new belt tensioning is possible.

Bei der in den Fig. 2 bis 5 gezeigten Ausführungsform ist der Elektromotor über einen Zahnriemen mit einem seitlich an der Gurtspule angeschlossenen Zahnrad gekoppelt, dessen Durchmesser größer ist als der des Antriebsritzels des Elektromotors. Der Zahnriemen wird durch einen Riemenspanner lastabhängig unter Spannung gesetzt. Im Normal­ betrieb ist die Riemenspannung gering, so daß der Antrieb extrem geräuscharm und verschleißarm arbeitet. Bei der Gurtbandstraffung wird die Riemenspannung erhöht, um eine Kraftübertragung ohne Überspringen der Zähne zu gewährleisten. Zugleich wird ein optimaler Spiel- und Toleranzausgleich erzielt.In the embodiment shown in FIGS . 2 to 5, the electric motor is coupled via a toothed belt to a toothed wheel connected laterally to the belt reel, the diameter of which is larger than that of the drive pinion of the electric motor. The toothed belt is tensioned by a belt tensioner depending on the load. In normal operation, the belt tension is low, so that the drive is extremely quiet and wear-free. The belt tension is increased in order to ensure power transmission without skipping the teeth. At the same time, an optimal play and tolerance compensation is achieved.

Der verwendete Elektromotor ist vorzugsweise ein verschleißarmer bürstenloser Vier-Phasen-Motor. Durch eine bifilare Statorwicklung werden niedrige Kommutierverluste erzielt. Durch die Verwendung eines Motors mit Außenläufer ergibt sich eine kompakte Bauform. Der Außen­ läufer trägt vorzugsweise einen 14-poligen Neodym-Magnetring, wodurch bei kompakter Bauform ein hohes Antriebsmoment erreicht werden kann, insbesondere im kurzzeitigen Überlastbetrieb. Zwei Hall-Sensoren liefern die Rotorlage, die Drehrichtung und daraus die Gurtbandaus­ zugslänge.The electric motor used is preferably a low-wear brushless four-phase motor. Through a bifilar stator winding low commutation losses are achieved. By using a Motors with external rotor result in a compact design. The outside runner preferably wears a 14-pin neodymium magnetic ring high drive torque can be achieved with a compact design, especially in short-term overload operation. Two Hall sensors deliver the position of the rotor, the direction of rotation and the belt webbing train length.

Der Sperrmechanismus des Gurtaufrollers besteht aus einem Loch­ kranz am Gurtspulenflansch und einem am Rahmen des Aufrollers axial verschiebbar sowie federbelastet gelagerten Raststift, der selektiv in den Löchern des Lochkranzes der Gurtspule verrastet wird. Das Ein­ greifen des Raststiftes in den Löchern des Lochkranzes wird durch daran angrenzende Einlaufschrägen erleichtert. Der Raststift wird durch einen Elektromagnet in der inaktivierten Ruhestellung gehalten. Im stromlosen Zustand wird der Raststift durch die Federbelastung in die Sperrstellung bewegt.The locking mechanism of the belt retractor consists of a hole ring on the belt reel flange and one axially on the frame of the retractor slidable and spring-loaded locking pin, which is selectively in the holes in the rim of the belt spool is locked. The one gripping the locking pin in the holes of the ring of holes is by adjoining inlet slopes easier. The index pin will held in the inactivated rest position by an electromagnet. In the de-energized state, the locking pin is moved in by the spring load the locked position moves.

Die in Fig. 1 gezeigte Steuerelektronik erfüllt insbesondere folgende Aufgaben:
The control electronics shown in FIG. 1 perform the following tasks in particular:

  • - Motorkommutierung;- motor commutation;
  • - Drehmomentsteuerung;- torque control;
  • - Überlastschutz;- overload protection;
  • - Ansteuerung der Gurtspulenentriegelung;- activation of the belt reel release;
  • - Steuerung aller Komfort- und Sicherheitsfunktionen; - Control of all comfort and safety functions;  
  • - kontinuierliche Berechnung der aktuellen Gurtauszugslänge über den absoluten Drehwinkel der Gurtspule;- Continuous calculation of the current belt extension length over the absolute angle of rotation of the belt reel;
  • - Eingangssignale der verschiedenen angeschlossenen Sensoren diskret und über ein angeschlossenes Bussystem (CAN);- Discrete input signals from the various connected sensors and via a connected bus system (CAN);
  • - schneller 8-bit-Controller mit Idle-Mode und integriertem EEPROM;- fast 8-bit controller with idle mode and integrated EEPROM;
  • - Stator auf der Leiterplatte integriert.- Stator integrated on the circuit board.

Bei der bevorzugten Ausführungsform eines Insassen-Rückhalte­ systems für Fahrzeuge haben alle Gurtaufroller denselben elektromecha­ nischen Grundaufbau und unterscheiden sich nur in ihrer Funktionali­ tät, die im wesentlichen durch die in der elektronischen Steuereinheit enthaltenen Programmdaten bestimmt wird. So ist beispielsweise die Funktionalität der vorderen Gurtaufroller verschieden von der der hinteren Gurtaufroller. Die elektronischen Steuereinheiten aller Gurt­ aufroller können an einem gemeinsamen Zentralsensor angeschlossen sein.In the preferred embodiment of an occupant restraint systems for vehicles all belt retractors have the same electromecha basic structure and differ only in their functionality act essentially by the in the electronic control unit contained program data is determined. For example, the Functionality of the front belt retractor different from that of the rear belt retractor. The electronic control units of all belt reels can be connected to a common central sensor his.

Claims (16)

1. Gurtaufroller für ein Insassen-Rückhaltesystem, mit:
  • - einem Rahmen;
  • - einer in dem Rahmen drehbar gelagerten Gurtspule;
  • - einem Sperrmechanismus zur selektiven Blockierung der Gurtspule;
  • - einem fahrzeugsensitiven Sensor;
  • - einem Aktor zur Betätigung des Sperrmechanismus;
  • - einem Elektromotor, durch den die Gurtspule antreibbar ist;
  • - einer elektronischen Steuereinheit, die eine Eingangsschnittstelle und eine Ausgangsschnittstelle aufweist;
wobei der fahrzeugsensitive Sensor an die Eingangsschnittstelle und der Aktor sowie der Elektromotor an die Ausgangsschnittstelle angeschlossen sind.1. Belt retractor for an occupant restraint system, with:
  • - a frame;
  • - A belt reel rotatably mounted in the frame;
  • - A locking mechanism for selective blocking of the belt reel;
  • - a vehicle sensitive sensor;
  • - An actuator for actuating the locking mechanism;
  • - An electric motor through which the belt reel can be driven;
  • an electronic control unit which has an input interface and an output interface;
the vehicle-sensitive sensor being connected to the input interface and the actuator and the electric motor being connected to the output interface. 2. Gurtaufroller nach Anspruch 1, mit einem der Steuereinheit zugeordneten Speichermodul, in dem wenigstens ein Teil der die Funktionalität der Steuereinheit bestimmenden Programmdaten gespeichert ist.2. Belt retractor according to claim 1, with one of the control unit assigned memory module in which at least part of the Functionality of the control unit determining program data is saved. 3. Gurtaufroller nach Anspruch 1, bei dem der Aktor durch einen Elektromagnet gebildet ist, der eine Sperrklinke des Sperrmechanismus ansteuert. 3. Belt retractor according to claim 1, wherein the actuator by a Electromagnet is formed, which is a pawl of the locking mechanism controls.   4. Gurtaufroller nach Anspruch 3, bei dem die Steuereinheit den Elektromotor bei einer auf einen bevorstehenden Fahrzeugaufprall hinweisenden Konstellation der Signale von mehreren an die Eingangsschnittstelle angeschlossenen Sensoren im Sinne einer Gurtbandstraffung ansteuert.4. Belt retractor according to claim 3, wherein the control unit Electric motor in the event of an impending vehicle crash indicative constellation of the signals from several to the Input interface connected sensors in the sense of a Belt tensioning controlled. 5. Gurtaufroller nach Anspruch 3 oder 4, bei dem der Elektromotor ein bürstenloser Vier-Phasen-Gleichstrom-Motor ist.5. Belt retractor according to claim 3 or 4, wherein the electric motor is a brushless four-phase DC motor. 6. Gurtaufroller nach einem der Ansprüche 3 bis 5, bei dem der Elektromotor eine bifilare Statorwicklung aufweist.6. Belt retractor according to one of claims 3 to 5, in which the Electric motor has a bifilar stator winding. 7. Gurtaufroller nach einem der Ansprüche 3 bis 6, bei dem der Elektromotor einen Außenläufer mit einem Neodym-Magnetring aufweist.7. Belt retractor according to one of claims 3 to 6, in which the Electric motor has an external rotor with a neodymium magnetic ring. 8. Gurtaufroller nach Anspruch 7, bei dem der Elektromotor einen 14- poligen Außenläufer aufweist.8. The belt retractor according to claim 7, wherein the electric motor has a 14- pole-shaped external rotor. 9. Gurtaufroller nach einem der Ansprüche 3 bis 8, bei dem der Elektromotor durch einen Zahnriemen mit der Gurtspule gekoppelt ist.9. Belt retractor according to one of claims 3 to 8, in which the Electric motor is coupled to the belt spool by a toothed belt. 10. Gurtaufroller nach Anspruch 9, bei dem der Zahnriemen ein Antriebsritzel des Elektromotors mit einem seitlich an der Gurtspule angeschlossenen Zahnrad größeren Durchmessers als das Antriebsritzel koppelt.10. Belt retractor according to claim 9, wherein the toothed belt Drive pinion of the electric motor with one on the side of the belt reel connected gear of larger diameter than the drive pinion couples. 11. Gurtaufroller nach Anspruch 10, bei dem der Elektromotor seitlich an einen Schenkel des Rahmens angesetzt ist.11. The belt retractor according to claim 10, wherein the electric motor laterally is attached to one leg of the frame. 12. Gurtaufroller nach Anspruch 11, bei dem der Elektromotor mit einer Leiterplatte, auf der eine elektronische Ansteuerschaltung mit Leistungs-Halbleiterelementen aufgebaut ist, zu einer Baugruppe zusammengefaßt ist.12. The belt retractor according to claim 11, wherein the electric motor with a Printed circuit board with an electronic control circuit Power semiconductor elements is built into an assembly is summarized. 13. Gurtaufroller nach einem der Ansprüche 3 bis 12, mit dem Elektromotor zugeordneten Sensoren, aus deren Signalen ein der abgezogenen Gurtbandlänge entsprechender absoluter Drehwinkel der Gurtspule durch die Steuereinheit bestimmbar ist. 13. Belt retractor according to one of claims 3 to 12, with the Electric motor associated sensors, from whose signals one of the subtracted webbing length corresponding absolute angle of rotation of the Belt reel can be determined by the control unit.   14. Gurtaufroller nach einem der Ansprüche 4 bis 13, bei dem die Steuereinheit zur Ansteuerung des Elektromotors wenigstens eines und vorzugsweise mehrere der folgenden Sensor-Signale berücksichtigt:
  • - ABS-Signal,
  • - Bremsdruck-Signal,
  • - Beschleunigungs-Signal,
  • - Fahrzeug-Geschwindigkeits-Signal,
  • - Motordrehzahl-Signal,
  • - Gurtkraft-Signal,
  • - Absoluter Gurtspulen-Drehwinkel.
14. Belt retractor according to one of claims 4 to 13, in which the control unit for controlling the electric motor takes into account at least one and preferably several of the following sensor signals:
  • - ABS signal,
  • - brake pressure signal,
  • - acceleration signal,
  • - vehicle speed signal,
  • - engine speed signal,
  • - belt force signal,
  • - Absolute belt spool rotation angle.
15. Gurtaufroller nach Anspruch 13 oder 14, bei dem die Steuereinheit die Gurtspule über den Elektromotor mit einem permanenten Aufrollmoment beaufschlagt, dessen Wert über den absoluten Drehwinkel der Gurtspule variabel ist.15. Belt retractor according to claim 13 or 14, wherein the Control unit the belt spool via the electric motor with a permanent winding torque applied, the value of which over the absolute Angle of rotation of the belt spool is variable. 16. Insassen-Rückhaltesystem für Fahrzeuge, mit mehreren Gurtaufrollern nach einem der vorstehenden Ansprüche, worin die Funktionalität eines jeden Gurtaufrollers durch die in dem Programmspeicher der jeweiligen Steuereinheit eingespeicherten Programmdaten bestimmt ist.16. Vehicle occupant restraint system, with multiple Belt retractors according to one of the preceding claims, wherein the Functionality of each belt retractor through the in the Program memory of the respective control unit stored Program data is determined.
DE19957814A 1999-12-01 1999-12-01 Gurtaufrollersystem Expired - Fee Related DE19957814C2 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
DE19957814A DE19957814C2 (en) 1999-12-01 1999-12-01 Gurtaufrollersystem
EP00125239A EP1104729B8 (en) 1999-12-01 2000-11-23 Belt retractor system
ES00125239T ES2158832T3 (en) 1999-12-01 2000-11-23 BELT RETRACTOR SYSTEM.
DE50010505T DE50010505D1 (en) 1999-12-01 2000-11-23 Gurtaufrollersystem
US09/726,666 US6447012B2 (en) 1999-12-01 2000-11-29 Belt retractor system
KR1020000071876A KR20010062011A (en) 1999-12-01 2000-11-30 Belt retractor system
CNB001344544A CN1140431C (en) 1999-12-01 2000-12-01 Retraction system of safety belt
JP2000366603A JP3786577B2 (en) 1999-12-01 2000-12-01 Belt retractor for passenger restraint system
CZ20004508A CZ293259B6 (en) 1999-12-01 2000-12-01 Belt retractor
BRPI0005685-5A BR0005685B1 (en) 1999-12-01 2000-12-01 belt retractor for an occupant restraint system and a vehicle occupant restraint system.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19957814A DE19957814C2 (en) 1999-12-01 1999-12-01 Gurtaufrollersystem

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DE19957814A1 true DE19957814A1 (en) 2001-06-13
DE19957814C2 DE19957814C2 (en) 2003-07-31

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DE19957814A Expired - Fee Related DE19957814C2 (en) 1999-12-01 1999-12-01 Gurtaufrollersystem
DE50010505T Expired - Lifetime DE50010505D1 (en) 1999-12-01 2000-11-23 Gurtaufrollersystem

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Country Link
US (1) US6447012B2 (en)
EP (1) EP1104729B8 (en)
JP (1) JP3786577B2 (en)
KR (1) KR20010062011A (en)
CN (1) CN1140431C (en)
BR (1) BR0005685B1 (en)
CZ (1) CZ293259B6 (en)
DE (2) DE19957814C2 (en)
ES (1) ES2158832T3 (en)

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DE102018102466A1 (en) * 2018-02-05 2019-08-08 Autoliv Development Ab Belt retractor, vehicle seat and motor vehicle
DE102018102466B4 (en) 2018-02-05 2021-08-05 Autoliv Development Ab Seat belt retractor, vehicle seat and motor vehicle
DE102018103289A1 (en) * 2018-02-14 2019-08-14 Autoliv Development Ab Seatbelt assembly, vehicle seat and motor vehicle
DE102018103289B4 (en) * 2018-02-14 2020-10-01 Autoliv Development Ab Seat belt assembly, vehicle seat and motor vehicle

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ES2158832T3 (en) 2005-12-01
CZ293259B6 (en) 2004-03-17
DE50010505D1 (en) 2005-07-14
CN1140431C (en) 2004-03-03
EP1104729B8 (en) 2005-08-31
JP3786577B2 (en) 2006-06-14
CZ20004508A3 (en) 2001-07-11
US20010037907A1 (en) 2001-11-08
CN1297829A (en) 2001-06-06
US6447012B2 (en) 2002-09-10
BR0005685A (en) 2002-01-22
EP1104729B1 (en) 2005-06-08
EP1104729A3 (en) 2003-10-15
ES2158832T1 (en) 2001-09-16
JP2001187561A (en) 2001-07-10
EP1104729A2 (en) 2001-06-06
KR20010062011A (en) 2001-07-07
BR0005685B1 (en) 2008-11-18
DE19957814C2 (en) 2003-07-31

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